A pile clamping device for vibrating hammer sinking offshore wind power single pile foundation

Abstract

The present invention discloses a pile clamping device for vibrating and sinking a single offshore wind power pile foundation using a vibratory hammer, comprising a top clamp and a bottom gusset plate. The top clamp comprises a vibratory hammer clamping portion and a gusset plate connecting portion; the outer diameter of the vibratory hammer clamping portion is adapted to the width of the clamping jaws of the vibratory hammer; the gusset plate connecting portion comprises an inner ring, a top plate, and an outer ring; a plurality of through holes are provided on the surface of the top plate; the bottom gusset plate comprises a clamping sleeve and a supporting ring; a plurality of perforations are provided on the top surface of the clamping sleeve; the inner diameter of the supporting ring is adapted to the outer diameter of the top of the single pile foundation; a plurality of through-type jacks are installed on the top plate; the top clamp is placed on the top surface of the pile top flange, the bottom gusset plate is sleeved on the top of the single pile foundation, and the clamping sleeve is inserted into the annular groove formed by the inner wall of the outer ring, the outer wall of the inner ring, and the top plate; after the pull rod is passed through the perforations, the through holes, and the through-type jacks in sequence, the pad and nut are installed on the pull rod in sequence. The present invention can not only adapt to different types of vibratory hammers, but also reduce the probability of deformation of the pile top flange.

Description

Technical Field

[0001] The invention relates to a pile clamping device for vibrating and sinking an offshore wind power monopile foundation with a vibrating hammer. Background Art

[0002] At present, vibratory hammer pile driving has been widely used in various engineering fields in China. It is also widely used in offshore wind power projects, but it is all used in the construction of steel pipe piles with a diameter of less than 3m. For offshore wind power single pile foundations, the pile diameter is generally greater than 5.5m. At present, the pile top diameter of domestic offshore wind power single pile foundations is generally 7.5m to 8.5m, which is much larger than the pile diameter of single pile foundations in other engineering fields. In addition to the ability of the vibratory hammer itself, the existence of the pile top flange is also a major factor hindering its application in the construction of offshore wind power single pile foundations. Under normal circumstances, vibratory hammer pile driving needs to be clamped on the top of the pile for vibration pile driving, but since the existing single pile foundations in China are equipped with a pile top flange, there will be the following problems when clamping directly on the pile top flange:

[0003] (1) The existing clamps cannot match the size of the pile top flange and cannot be clamped directly;

[0004] (2) Since the purpose of the pile top flange is to connect the tower after construction is completed, it is required that the pile top flange cannot be deformed during construction. However, the energy of the vibratory hammer during the vibration pile sinking process is very large, and the pile top is very likely to deform or even tear. If it is directly clamped on the pile top flange, it is difficult to ensure that the pile top flange does not deform.

[0005] Therefore, if most of the vibratory hammers currently available in China are to be used for vibration pile sinking of single pile foundations, they must solve the problem of not being suitable for single piles with pile top flanges. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the prior art and provide a pile clamping device for vibrating a single offshore wind power pile foundation using a vibrating hammer. The device can not only adapt to different types of vibrating hammers, but also minimize the deformation probability of the pile top flange.

[0007] The object of the present invention is achieved as follows: A pile clamping device for vibrating and sinking a single offshore wind power pile foundation by a vibratory hammer comprises a top clamp, a bottom gusset plate, a plurality of through-type jacks, a plurality of tie rods, a plurality of pads and a plurality of nuts;

[0008] The top clamp includes an integrally formed vibrating hammer clamping portion and a gusset plate connecting portion; wherein,

[0009] The vibrating hammer clamping portion is cylindrical and has an outer diameter that matches the width of the vibrating hammer's clamping jaws;

[0010] The gusset plate connection portion is located at the lower part of the vibrating hammer clamping portion, and the gusset plate connection portion includes an inner ring coaxially connected to the lower end of the vibrating hammer clamping portion, a top plate connected to the top outer end of the inner ring, and an outer ring connected to the outer end of the top plate; the inner diameter of the inner ring is less than or equal to the inner diameter of the pile top flange of the single pile foundation, and the outer diameter of the inner ring is adapted to the outer diameter of the pile top flange; a plurality of through holes are axially opened on the surface of the top plate uniformly distributed along the circumference;

[0011] The axial section of the bottom gusset plate is L-shaped, and the vertical part is a clamping sleeve, and the horizontal part is a supporting ring; wherein,

[0012] The inner diameter of the ferrule is adapted to the outer diameter of the pile top flange of the monopile foundation, and the outer diameter of the ferrule is smaller than the inner diameter of the outer ring of the gusset plate connecting portion. A plurality of through holes are uniformly distributed axially on the top surface of the ferrule along the circumference, corresponding to the plurality of through holes on the gusset plate connecting portion.

[0013] The inner diameter of the support ring is adapted to the outer diameter of the top of the monopile foundation;

[0014] A plurality of through-type jacks are mounted on the top surface of the top plate of the gusset plate connecting portion in a one-to-one correspondence with the plurality of through holes;

[0015] The pull rod is made of finely rolled threaded steel and a pull plate is fixed at the lower end;

[0016] The top clamp is coaxially seated on the top surface of the pile top flange of the monopile foundation, the bottom gusset plate is sleeved on the top of the monopile foundation and the ferrule is inserted into the annular groove formed by the inner wall of the outer ring of the gusset plate connection part, the outer wall of the inner ring and the top plate; a plurality of tie rods are correspondingly passed through a plurality of through holes on the ferrule and a plurality of through holes on the top plate and then through a plurality of through-type jacks; a plurality of pads are correspondingly sleeved on the plurality of tie rods and located on the top surfaces of the through-type jacks; a plurality of nuts are correspondingly screwed on the plurality of tie rods and located on the top surfaces of the pads;

[0017] The plurality of pull rods are lifted one by one by using a plurality of through-type jacks to lift the bottom buckle plate until the top surface of the support ring contacts the bottom surface of the pile top flange, and then the plurality of pads are fastened one by one to the top surface of the through-type jacks by using a plurality of nuts.

[0018] The above-mentioned vibratory hammer vibrating pile clamping device for offshore wind power single pile foundation, wherein, if the inner diameter of the vibratory hammer clamping part is greater than or equal to the inner diameter of the pile top flange, the upper inner diameter of the inner ring is the same as the inner diameter of the vibratory hammer clamping part, and the lower inner hole surface of the inner ring is an inverted cone surface, so that the lower end inner diameter of the inner ring is less than or equal to the inner diameter of the pile top flange of the single pile foundation.

[0019] In the above-mentioned pile clamping device for vibrating and sinking offshore wind power monopile foundations with a vibrating hammer, the bottom clip plate is formed by two semicircular clip plates being clamped together by screws.

[0020] The pile clamping device for vibrating a hammer to sink an offshore wind power monopile foundation of the present invention has the following characteristics:

[0021] 1. The vibrating hammer clamping part of the top fixture is used to adapt to the width of the clamping jaws of different types of vibrating hammers;

[0022] 2. The inner ring in the top clamp and the support ring in the bottom gusset plate are clamped to the top and bottom surfaces of the pile top flange, respectively. The ferrule in the bottom gusset plate is then fitted over the outer circumference of the pile top flange. Because the pile clamp is completely clamped to the surface of the pile top flange, it can disperse the energy of the vibrating hammer to the greatest extent possible across the entire surface of the pile top flange, reducing the concentrated stress on the pile top flange and minimizing the probability of deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a perspective view of the pile clamping device for vibrating and sinking a single offshore wind turbine pile foundation using a vibratory hammer according to the present invention;

[0024] Figure 2 is a perspective exploded view of the pile clamping device of the present invention;

[0025] Figure 3 is a perspective view of a top clamp in the pile clamping device of the present invention;

[0026] Figure 4 This is a three-dimensional view of the bottom gusset plate in the pile clamp device of the present invention.

[0027] Figure 5 is an axial cross-sectional view of the pile clamping device of the present invention;

[0028] Figure 6 yes Figure 5 Magnified view of the P site in the middle. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] See also Figures 1 to 6 The pile clamping device for a vibratory hammer-sinking offshore wind power monopile foundation of the present invention comprises a top clamp 1, a bottom buckle plate 2, a plurality of through-type jacks 3, a plurality of pull rods 4, a plurality of pads 5 and a plurality of nuts 6.

[0031] The top clamp 1 includes an integrally formed vibrating hammer clamping portion 11 and a clamping portion 12; wherein,

[0032] The vibrating hammer clamping portion 11 is cylindrical and has an outer diameter that matches the width of the vibrating hammer's clamping jaws;

[0033] The gusset plate connection part 12 is provided at the lower part of the vibratory hammer clamping part 11, and the gusset plate connection part 12 includes an inner ring 121 coaxially connected to the lower end of the vibratory hammer clamping part 11, a top plate 122 connected to the top outer end of the inner ring 121, and an outer ring 123 connected to the outer end of the top plate 122; the inner diameter of the inner ring 121 is less than or equal to the inner diameter of the pile top flange 10 of the single pile foundation 100, and the outer diameter of the inner ring 121 is adapted to the outer diameter of the pile top flange 10; a plurality of through holes 120 are axially opened uniformly along the circumference on the surface of the top plate 123; the number of through holes 120 is set according to the pile diameter of the single pile foundation 100, and is preferably 8 to 40.

[0034] The axial section of the bottom gusset plate 2 is L-shaped, and the vertical part is a clamping sleeve 21, and the horizontal part is a support ring 22; wherein,

[0035] The inner diameter of the ferrule 21 is adapted to the outer diameter of the pile top flange 10 of the monopile foundation 100. The outer diameter of the ferrule 21 is smaller than the inner diameter of the outer ring 123 of the gusset plate connecting portion 12. A plurality of through holes 210 are uniformly distributed axially along the circumference on the top surface of the ferrule 21, which correspond one-to-one to the plurality of through holes 120 on the gusset plate connecting portion 12.

[0036] The inner diameter of the support ring 22 is adapted to the outer diameter of the top of the monopile foundation 100 .

[0037] A plurality of through-type jacks 3 are mounted on the top surface of the top plate 122 of the gusset plate connecting portion 12 in a one-to-one correspondence with the plurality of through holes 120;

[0038] The pull rod 4 is made of finely rolled threaded steel and a pull plate 40 is fixed at the lower end;

[0039] The top clamp 1 is coaxially seated on the top surface of the pile top flange 10 of the monopile foundation 100, the bottom gusset plate 2 is sleeved on the top of the monopile foundation 100 and the ferrule 21 is inserted into the annular groove formed by the inner wall of the outer ring 123 of the gusset plate connecting part 12, the outer wall of the inner ring 121 and the top plate 122; a plurality of tie rods 4 are correspondingly passed through the plurality of through holes 210 on the ferrule 21 and the plurality of through holes 120 on the top plate 122, and then through the plurality of through-type jacks 3, and the pull plates 40 at the lower ends of the tie rods 4 are left at the bottom of the ferrule 21; a plurality of pads 5 are correspondingly sleeved on the plurality of tie rods 4 and are located on the top surfaces of the through-type jacks 3; a plurality of nuts 6 are correspondingly screwed on the plurality of tie rods 4 and are located on the top surfaces of the pads 5;

[0040] By using multiple through-type jacks 3 to lift multiple tie rods 4 one by one, the bottom buckle plate 2 is lifted until the top surface of the support ring 22 contacts the bottom surface of the pile top flange 100, and then multiple nuts 6 are used to fasten multiple pads 5 to the top surfaces of the through-type jacks 3 one by one.

[0041] For ease of installation, the bottom gusset plate 2 is formed by two semicircular ring gusset plates 2'. Each end face of the two semicircular ring gusset plates 2' is provided with an end plate 20, which has bolt holes. After the two semicircular ring gusset plates 2' are installed in place on the monopile foundation 100, they are fastened together using screws and nuts.

[0042] If the inner diameter of the vibratory hammer clamping part 11 in the top clamp 1 is greater than or equal to the inner diameter of the pile top flange 10 (the inner diameter of the single pile foundation 100), the upper inner diameter of the inner ring 121 is the same as the inner diameter of the vibratory hammer clamping part 11. The lower inner hole surface of the inner ring 121 is an inverted cone surface, so that the lower end inner diameter of the inner ring 121 is less than or equal to the inner diameter of the pile top flange 10. The bottom surface of the inner ring 121 can be completely covered on the top surface of the pile top flange 10, thereby dispersing the energy of the vibratory hammer.

[0043] The pile clamping device for vibrating a hammer to sink an offshore wind turbine monopile foundation of the present invention is installed on the monopile foundation 100 before sinking the pile, and is carried out according to the following steps:

[0044] 1. Use a crane to hoist the top fixture 1 onto the top surface of the pile top flange 10, and adjust the relative position between the pile top flange 10 and the top fixture 1;

[0045] 2. Place multiple through-type jacks 3 on the top plate 122 of the top fixture 1 and align them one by one with the multiple through holes 120;

[0046] 3. Lift a semicircular annular gusset plate 2' from the bottom of the monopile foundation 100, insert tie rods 4 into all the through holes 210 of the semicircular annular gusset plate 2' and the corresponding through holes 120 of the top fixture 1, then install a backing plate 5 on the tie rod 4 on the upper part of the through-type jack 3 and temporarily secure it with nuts 6;

[0047] 4. Install the other semicircular annular gusset plate 2', tie rod 4 and backing plate 5 and temporarily secure them with nuts 6;

[0048] 5. Lift all the tie rods 4 of the semicircular annular gusset plate 2' one by one using multiple through-type jacks 3 until the ferrules 21 on the two halves of the semicircular annular gusset plate 2' are inserted into the annular groove formed by the inner wall of the outer ring 123 of the gusset plate connecting portion 12, the outer wall of the inner ring 121, and the top plate 122, until the top surface of the support ring 22 contacts the bottom surface of the pile top flange 100. Then, use bolts and nuts to fix the two halves of the semicircular annular gusset plate 2' into a whole.

[0049] 6. Apply loads to all through-type jacks 3 and lift the entire monopile foundation 100 through the pile clamping device.

[0050] The pile clamping device of the present invention adapts to the width of the clamping jaws of different types of vibratory hammers through the vibratory hammer clamping portion 11 of the top clamp 1. The inner ring 121 of the top clamp 1 and the support ring 22 of the bottom gusset plate 2 respectively clamp the top and bottom surfaces of the pile top flange 10, and the clamping sleeve 21 of the bottom gusset plate 2 is inserted into the outer circumference of the pile top flange 10. Because the pile clamping device is entirely clamped to the surface of the pile top flange 10, it can disperse the energy of the vibratory hammer to the greatest extent possible over the entire surface of the pile top flange 10, reducing the concentrated stress on the pile top flange 10 and thus minimizing the probability of deformation of the pile top flange 10.

[0051] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A vibratory hammer-sinking pile clamping device for offshore wind turbine monopile foundations, comprising a top clamp, a bottom gusset plate, multiple through-type jacks, multiple tie rods, multiple pads, and multiple nuts; characterized in that: The top clamp includes an integrally formed vibrating hammer clamping portion and a gusset plate connecting portion; wherein, The vibrating hammer clamping portion is cylindrical and has an outer diameter that matches the width of the vibrating hammer clamping jaws; The gusset plate connection portion is located at the lower part of the vibrating hammer clamping portion, and the gusset plate connection portion includes an inner ring coaxially connected to the lower end of the vibrating hammer clamping portion, a top plate connected to the top outer end of the inner ring, and an outer ring connected to the outer end of the top plate; the inner diameter of the inner ring is less than or equal to the inner diameter of the pile top flange of the single pile foundation, and the outer diameter of the inner ring is adapted to the outer diameter of the pile top flange; a plurality of through holes are axially opened on the surface of the top plate uniformly distributed along the circumference; The axial section of the bottom gusset plate is L-shaped, and the vertical part is a clamping sleeve, and the horizontal part is a supporting ring; wherein, The inner diameter of the ferrule is adapted to the outer diameter of the pile top flange of the monopile foundation, and the outer diameter of the ferrule is smaller than the inner diameter of the outer ring of the gusset plate connecting portion. A plurality of through holes are uniformly distributed axially on the top surface of the ferrule along the circumference, corresponding to the plurality of through holes on the gusset plate connecting portion. The inner diameter of the support ring is adapted to the outer diameter of the top of the monopile foundation; A plurality of through-type jacks are mounted on the top surface of the top plate of the gusset plate connecting portion in a one-to-one correspondence with the plurality of through holes; The pull rod is made of finely rolled threaded steel and a pull plate is fixed at the lower end; The top clamp is coaxially seated on the top surface of the pile top flange of the monopile foundation, the bottom gusset plate is sleeved on the top of the monopile foundation and the ferrule is inserted into the annular groove formed by the inner wall of the outer ring of the gusset plate connection part, the outer wall of the inner ring and the top plate; a plurality of tie rods are correspondingly passed through a plurality of through holes on the ferrule and a plurality of through holes on the top plate and then through a plurality of through-type jacks; a plurality of pads are correspondingly sleeved on the plurality of tie rods and located on the top surfaces of the through-type jacks; a plurality of nuts are correspondingly screwed on the plurality of tie rods and located on the top surfaces of the pads; The plurality of pull rods are lifted one by one by using a plurality of through-type jacks to lift the bottom buckle plate until the top surface of the support ring contacts the bottom surface of the pile top flange, and then the plurality of pads are fastened one by one to the top surface of the through-type jacks by using a plurality of nuts.

2. The pile clamping device for vibrating a single offshore wind turbine foundation using a vibratory hammer according to claim 1 is characterized in that: If the inner diameter of the vibratory hammer clamping portion is greater than or equal to the inner diameter of the pile top flange, the upper inner diameter of the inner ring is the same as the inner diameter of the vibratory hammer clamping portion, and the lower inner hole surface of the inner ring is an inverted cone surface, so that the lower end inner diameter of the inner ring is less than or equal to the inner diameter of the pile top flange of the single pile foundation.

3. The pile clamping device for vibrating a single offshore wind power pile foundation using a vibratory hammer according to claim 1, characterized in that: The bottom gusset plate is formed by two semicircular gusset plates being embraced by screws.

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